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?? access.js(3.23 KB)
?? adduser.js(3.98 KB)
?? bin.js(515 B)
?? bugs.js(857 B)
?? build.js(8.5 KB)
?? cache
?? cache.js(10.17 KB)
?? completion.js(7.06 KB)
?? config
?? config.js(8.27 KB)
?? dedupe.js(5.27 KB)
?? deprecate.js(1.4 KB)
?? dist-tag.js(3.67 KB)
?? docs.js(1.03 KB)
?? edit.js(985 B)
?? explore.js(1.63 KB)
?? fetch-package-metadata.js(11.5 KB)
?? fetch-package-metadata.md(1.76 KB)
?? get.js(235 B)
?? help-search.js(5.65 KB)
?? help.js(6.19 KB)
?? init.js(1.27 KB)
?? install
?? install-test.js(507 B)
?? install.js(25.49 KB)
?? link.js(5.55 KB)
?? logout.js(1.1 KB)
?? ls.js(13.94 KB)
?? npm.js(11.23 KB)
?? outdated.js(12.1 KB)
?? owner.js(7.55 KB)
?? pack.js(1.79 KB)
?? ping.js(556 B)
?? prefix.js(330 B)
?? prune.js(1.5 KB)
?? publish.js(5.02 KB)
?? rebuild.js(2.11 KB)
?? repo.js(1.43 KB)
?? restart.js(64 B)
?? root.js(316 B)
?? run-script.js(5.16 KB)
?? search.js(7.76 KB)
?? set.js(276 B)
?? shrinkwrap.js(6.54 KB)
?? star.js(1.17 KB)
?? stars.js(1.1 KB)
?? start.js(62 B)
?? stop.js(61 B)
?? substack.js(509 B)
?? tag.js(1.08 KB)
?? team.js(1.41 KB)
?? test.js(294 B)
?? unbuild.js(3.97 KB)
?? uninstall.js(2.31 KB)
?? unpublish.js(3.55 KB)
?? update.js(1.76 KB)
?? utils
?? version.js(7.71 KB)
?? view.js(9.12 KB)
?? visnup.js(4.01 KB)
?? whoami.js(1.42 KB)
?? xmas.js(1.57 KB)

Editing: shrinkwrap.js

// emit JSON describing versions of all packages currently installed (for later
// use with shrinkwrap install)

module.exports = exports = shrinkwrap

var path = require('path')
var log = require('npmlog')
var writeFileAtomic = require('write-file-atomic')
var iferr = require('iferr')
var readPackageJson = require('read-package-json')
var readPackageTree = require('read-package-tree')
var validate = require('aproba')
var chain = require('slide').chain
var npm = require('./npm.js')
var recalculateMetadata = require('./install/deps.js').recalculateMetadata
var validatePeerDeps = require('./install/deps.js').validatePeerDeps
var isExtraneous = require('./install/is-extraneous.js')
var packageId = require('./utils/package-id.js')
var moduleName = require('./utils/module-name.js')
var output = require('./utils/output.js')
var lifecycle = require('./utils/lifecycle.js')
var isDevDep = require('./install/is-dev-dep.js')
var isProdDep = require('./install/is-prod-dep.js')
var isOptDep = require('./install/is-opt-dep.js')

shrinkwrap.usage = 'npm shrinkwrap'

function shrinkwrap (args, silent, cb) {
  if (typeof cb !== 'function') {
    cb = silent
    silent = false
  }

if (args.length) {
    log.warn('shrinkwrap', "doesn't take positional args")
  }

var packagePath = path.join(npm.localPrefix, 'package.json')
  var dev = !!npm.config.get('dev') || /^dev(elopment)?$/.test(npm.config.get('also'))

readPackageJson(packagePath, iferr(cb, function (pkg) {
    createShrinkwrap(npm.localPrefix, pkg, dev, silent, cb)
  }))
}

module.exports.createShrinkwrap = createShrinkwrap

function createShrinkwrap (dir, pkg, dev, silent, cb) {
  lifecycle(pkg, 'preshrinkwrap', dir, function () {
    readPackageTree(dir, andRecalculateMetadata(iferr(cb, function (tree) {
      var pkginfo = treeToShrinkwrap(tree, dev)

chain([
        [lifecycle, tree.package, 'shrinkwrap', dir],
        [shrinkwrap_, pkginfo, silent],
        [lifecycle, tree.package, 'postshrinkwrap', dir]
      ], iferr(cb, function (data) {
        cb(null, data[0])
      }))
    })))
  })
}

function andRecalculateMetadata (next) {
  validate('F', arguments)
  return function (er, tree) {
    validate('EO', arguments)
    if (er) return next(er)
    recalculateMetadata(tree, log, next)
  }
}

function treeToShrinkwrap (tree, dev) {
  validate('OB', arguments)
  var pkginfo = {}
  if (tree.package.name) pkginfo.name = tree.package.name
  if (tree.package.version) pkginfo.version = tree.package.version
  var problems = []
  if (tree.children.length) {
    shrinkwrapDeps(dev, problems, pkginfo.dependencies = {}, tree)
  }
  if (problems.length) pkginfo.problems = problems
  return pkginfo
}

function shrinkwrapDeps (dev, problems, deps, tree, seen) {
  validate('BAOO', [dev, problems, deps, tree])
  if (!seen) seen = {}
  if (seen[tree.path]) return
  seen[tree.path] = true
  Object.keys(tree.missingDeps).forEach(function (name) {
    var invalid = tree.children.filter(function (dep) { return moduleName(dep) === name })[0]
    if (invalid) {
      problems.push('invalid: have ' + invalid.package._id + ' (expected: ' + tree.missingDeps[name] + ') ' + invalid.path)
    } else if (!tree.package.optionalDependencies || !tree.package.optionalDependencies[name]) {
      var topname = packageId(tree)
      problems.push('missing: ' + name + '@' + tree.package.dependencies[name] +
        (topname ? ', required by ' + topname : ''))
    }
  })
  tree.children.sort(function (aa, bb) { return moduleName(aa).localeCompare(moduleName(bb)) }).forEach(function (child) {
    var childIsOnlyDev = isOnlyDev(child)
    if (!dev && childIsOnlyDev) {
      log.warn('shrinkwrap', 'Excluding devDependency: %s', child.location)
      return
    }
    var pkginfo = deps[moduleName(child)] = {}
    pkginfo.version = child.package.version
    pkginfo.from = child.package._from
    pkginfo.resolved = child.package._resolved
    if (dev && childIsOnlyDev) pkginfo.dev = true
    if (isOptional(child)) pkginfo.optional = true
    if (isExtraneous(child)) {
      problems.push('extraneous: ' + child.package._id + ' ' + child.path)
    }
    validatePeerDeps(child, function (tree, pkgname, version) {
      problems.push('peer invalid: ' + pkgname + '@' + version +
        ', required by ' + child.package._id)
    })
    if (child.children.length) {
      shrinkwrapDeps(dev, problems, pkginfo.dependencies = {}, child, seen)
    }
  })
}

function shrinkwrap_ (pkginfo, silent, cb) {
  if (pkginfo.problems) {
    return cb(new Error('Problems were encountered\n' +
                        'Please correct and try again.\n' +
                        pkginfo.problems.join('\n')))
  }

save(pkginfo, silent, cb)
}

function save (pkginfo, silent, cb) {
  // copy the keys over in a well defined order
  // because javascript objects serialize arbitrarily
  var swdata
  try {
    swdata = JSON.stringify(pkginfo, null, 2) + '\n'
  } catch (er) {
    log.error('shrinkwrap', 'Error converting package info to json')
    return cb(er)
  }

var file = path.resolve(npm.prefix, 'npm-shrinkwrap.json')

writeFileAtomic(file, swdata, function (er) {
    if (er) return cb(er)
    if (silent) return cb(null, pkginfo)
    output('wrote npm-shrinkwrap.json')
    cb(null, pkginfo)
  })
}

// Returns true if the module `node` is only required direcctly as a dev
// dependency of the top level or transitively _from_ top level dev
// dependencies.
// Dual mode modules (that are both dev AND prod) should return false.
function isOnlyDev (node, seen) {
  if (!seen) seen = {}
  return node.requiredBy.length && node.requiredBy.every(andIsOnlyDev(moduleName(node), seen))
}

// There is a known limitation with this implementation: If a dependency is
// ONLY required by cycles that are detached from the top level then it will
// ultimately return ture.
//
// This is ok though: We don't allow shrinkwraps with extraneous deps and
// these situation is caught by the extraneous checker before we get here.
function andIsOnlyDev (name, seen) {
  return function (req) {
    var isDev = isDevDep(req, name)
    var isProd = isProdDep(req, name)
    if (req.isTop) {
      return isDev && !isProd
    } else {
      if (seen[req.path]) return true
      seen[req.path] = true
      return isOnlyDev(req, seen)
    }
  }
}

function isOptional (node, seen) {
  if (!seen) seen = {}
  // If a node is not required by anything, then we've reached
  // the top level package.
  if (seen[node.path] || node.requiredBy.length === 0) {
    return false
  }
  seen[node.path] = true

return node.requiredBy.every(function (req) {
    return isOptDep(req, node.package.name) || isOptional(req, seen)
  })
}

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Editing: shrinkwrap.js

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